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Ceramic foam filter

Ceramic foam filter is a kind of effective molten metal filter. It’s three-dimensional connected mesh structure and high porosity has many advantages, for example, large surface area of slags collection, large inner surface area of filtering, small flow resistance, good filtering effect, etc.

Functions of ceramic foam filter.
Decontaminate the molten metal liquid.
Simplified gating system.
Improve the metallurgical structure of the castings.
Reduce slag inclusions of the castings.
Increase the casting quality rate.
Reduce casting internal re-oxidation defects.
Reduce the surface defects after machining of the castings. 

Physical properties for ceramic foam filter

Material Alumina Silicon carbide Zirconia Magnesia
Color White Grey black Yellow Dark yellow
Pore density 8-60ppi 8-60ppi 8-60ppi 8-60ppi
Porosity 80-90% 80-90% 80-90% 80-90%
Refractoriness 1100℃ 1500℃ 1700℃ 1000℃
Bending strength 0.6Mpa 0.8Mpa 1.0Mpa 0.6Mpa
Compression strength 0.8Mpa 0.9Mpa 1.2Mpa 0.8Mpa
Volume-weight 0.3-0.45g/cm3 0.35-0.5g/cm3 0.9-1.5g/cm3 0.3-0.5g/cm3
Thermal shock resistance 6 times/1100℃ 6 times/1100℃ 6 times/1100℃ 6 times/1100℃
Applications Aluminium, aluminium alloys and other non-ferrous alloys Ductile cast iron, malleable cast iron, gray iron and other cast iron High melting point metal alloys like steel, alloy steel, stainless steel etc Magnesium and high-active alloy 

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